Name:_________________________________ Mods:_______________ Partner:________________________________ Date:________________

Lab: ALUMINUM FOIL THICKNESS Purpose: The purpose of this activity is to relate the size of an aluminum atom to the thickness of a piece of aluminum. Procedure:

1. Mass a cylinder of aluminum metal.

2. Measure the volume of the cylinder by displacement

3. Obtain a piece of aluminum foil

4. Measure the length and width of the piece of aluminum foil to the nearest 0.1 cm.

5. Mass the piece of aluminum foil

Data:

A. Mass of metal cylinder B. Volume of water in graduated cylinder C. Volume of water plus metal cylinder D. Volume of metal cylinder (C-B) E. Length of aluminum F. Width of aluminum G. Mass of aluminum foil H. Density of aluminum (A/D) I. Volume of foil (G/H) J. Height of foil (V = L x W x H) K. Moles of aluminum in foil (convert G to moles)

L. Atoms of aluminum foil M. Atoms thick of Aluminum foil

Calculations: 1. Determine the density of aluminum. Record in H.

D = M (A)/V (D)

2. Find the volume of the foil and record it in I. V = M (G)/D (H)

3. Find the height (thickness) of the foil and record it in J. V = l x w x h

Analysis: One aluminum atom is 2.5 x 10-8 cm thick. Find the thickness of the foil in atoms.

Number of height (J) x 1 atom___ Atoms thick = 2.5 x 10-8cm

Calculate the number of moles of aluminum and the total number of atoms of aluminum in your piece of aluminum foil. Conclusion: